Use a direct include of the message_loop header in media/.

media/audio/audio_manager.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "media/audio/audio_manager.h"
 
 #include "base/at_exit.h"
 #include "base/atomicops.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/logging.h"
-#include "base/message_loop.h"
+#include "base/message_loop/message_loop.h"
 
 namespace media {
 namespace {
 AudioManager* g_last_created = NULL;
 }
 
 // Forward declaration of the platform specific AudioManager factory function.
 AudioManager* CreateAudioManager();
 
 AudioManager::AudioManager() {
@@ skipping 10 matching lines @@
   g_last_created = CreateAudioManager();
   return g_last_created;
 }
 
 // static
 AudioManager* AudioManager::Get() {
   return g_last_created;
 }
 
 }  // namespace media